Audio mixing board



FIG. 1 is a perspective view of an audio mixing board showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view of one side thereof;

FIG. 5 is a side elevational view of the other side thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is a rear elevational view thereof.

The broken line showings of the elements on the top and rear surfaces of the board and the indicia on the sides form no part of the claimed design. 

The ornamental design for an audio mixing board, as shown and described. 